distance problem

Mary walked 4 laps around the park track. It took Mary 4 minutes to walk the first lap. The second lap took 25% longer than the first lap. The third lap took 20%longer than the second lap. The final lap took 50% longer than the third. What wasMary’s total walking time for the 4 laps?

Mary walked 4 laps around the park track. It took Mary 4 minutes to walk the first lap. The second lap took 25% longer than the first lap. The third lap took 20%longer than the second lap. The final lap took 50% longer than the third. What wasMary’s total walking time for the 4 laps?